Gear



Jan. 3, 1939.

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GEAR

Richard Seidel. Dresden, Germany, assigner to Vasanta Maschinenfabrik A.G., Dresden, Ger- Application May k1, 1936, Serial No. 77,887 In Germany May 3, 1935 4 Claims.

a common shaft, the control mechanisms being provided with rocking levers driven by the eccentric member. Owing to the eccentic adjustment, more or less swinging motion is imparted to the levers and, by means of the control mechanisms, converted into a unilaterally acting rotary motion. To increase the degree of uniformity of the rotary motion transmitted to the driven shaft the control mechanisms employed preferably act in opposite directions so as to utilize both the forward and return motion of the swinging levers controlled by the eccentricmembers for power transmission.

By way of example, the invention is illustrated in the accompanying drawings, in which Figure 1 is a longitudinal section of the gear; Fig. 2, a side view of the driven member in the direction of the arrow IV vin Fig. 4; Fig 3, a view of the driven member in the direction of the arrow III in Fig. 2; and Fig. 4, a cross section of the driven member on the line E-F, of Fig. l.

On the driven side of the machine casing I partitions 2, 3 are provided for carrying the driven shaft 4. By means of an interposed pin bearing 5 the front end 5 of the shaft 4 is arranged in a bush 1 the lower end of which is firmly connected with the wall 2. The walls 2 and 3 are connected by means of 'the screw bolts 8 and the nuts 9 and kept at equal distance from one another by the collar of the bolt I8. 'Ihe driven shaft 4 hasa collar II disposed in a bush I2 of the wall 3. Between the two walls 2 and 8 the driven shaft 4 is provided with a driven wheel I8 and a pin bearing I4 on which a central toothed wheel I 5 is loosely rotatably disposed. The wheel I5 has a neck I6 guided in the bush I2 and serving as bearing for the collar I I of the shaft 4.

In the walls 2 and 3 pins 12 are disposed, and the rocking levers 13 are secured to the free ends thereof by means of the screws 14. The angular arms carry the pins 15 whose rolls 18 engage the groove 11 of a rotary member adjustable as to eccentricity. Between the walls 2 and 3 the cages 18 and 19 are firmly keyed to the pin I2 and have the clamp rolls 82 arranged in their recesses 88 and 8l. The recesses 80 of the cages 18 taper towards one side and the recesses 8| of the cages 18 towards the other side in such manner that the rolls positioned in the recesses 88 during motion of the cages in one direction drive only the toothed rims 88 loosely rotatably disposed on the cages 18 and duringy motion of the cages in the other direction, only the toothed rims 84 loosely arranged on the cages 18.- All rims 88 of the control mechanisms 18, 80, 82 are in engagement with the toothed rim I3 of the driven shaft 4, whereas the rims 84 are in mesh with the central toothed wheel I 5 loosely disposed on the driven shaft.

'I'he toothed :4ms 84 of the control mechanisms acting in one direction oi' motion, which are in engagement with the central toothed wheel I5, transmit their rotary motion to the control mechanisms acting in the other direction and provided with the toothed rims 88 by means of the meshing reversing pinions 88, 89 which through interpinions 88,89 as closely as possible to the adjacent U vcontrol mechanisms and thus save space the toothed wheels 88" and 84', which are not 1n directrengagement with the pinions, as well as the pinions. themselves are recessed.

The reversing pinion 89 meshes with the adjacent toothed wheel 83' and possesses at its lower end a recess 9| wherein the toothing of the toothed wheel 84 located below the toothed wheel 83 can freely move. The toothed wheel 84 is provided with a recess wherein the toothing of the reversing pinion 88 can freely move. The reversing pinion 88 in mesh with the adjacent toothed wheel 84" is also provided with a recess 93 in which the toothing of the toothed wheel S3" positioned above the toothed wheel 84" freely moves. 'I'he wheel 83 has a corresponding recess 82 in which the toothing of the reversing pinion 88 can freely move.

The device functions as follows:

To regulate speed the control shaft 36 is turned in one or the other direction, and this rotary motion is transmitted by the bevel gears 34, 35 to the pinion 30 which is in mesh with the spur gear 25. 'I'he rotation of the gear 26 is transmitted to the element 25 which with its internal thread 24 engages the external thread of the bush 1 to be screwed up andv down in axial direction. The axial motion is transmitted through the thrust bearing taking up axial and radial pressures to the sleeve 40 and to the rack 88 connected therewith, so that the toothed wheel 81 meshing with the rack 58 is turned to the left or right, whereby the ring carrier 53, having the toothing 68 in mesh with the toothed wheel 61,

is radially adjusted inwardly or outwardly relative to the shafts l and Il. A similar radial motion is carried out by the guide ring il loosely disposed on the ring carrier 53, and in the groove l! of the guide il the rolls Il of the rocking levers 1I are sliding.

When at a corresponding adjustment of the control shaft 3l the guide ring Il is in central position relative to the driving shaft 20, the rocking levers do not perform any pendulum motion, i. e., the driven shaft 4 stands still. By a corresponding actuation of the control shaft It the guide ring Il is moved farther outwarchy in radial direction and owing to its eccentric position brought about thereby imparts to the rocking levers 'I8 a greater or lesser pendulum motion which has its effect in the form of forward and backward motions on the pin 12 and the members 1l, Il, I2, l! or 1, Il, 82, Il which transmit their greater or lesser rotary motion to the driven shaft I.v`

I claim:-

1. A transmission gear capable of regulating speed without gradation from zero up to maximum, comprising a driving shaft, a driven shaft, an eccentrically adjustable member on said driving shaft, a plurality of control mechanisms arranged in a circle around said eccentric member, rocking levers actuated by said eccentric member, pins about which said rocking levers oscillate, two

of said control mechanisms operating in opposite directions being arranged on each pin one behind the other, toothed rims on said control mecha' nisms, a central toothed wheel loosely rotatably disposed on said driven shaft, the rims of the control mechanisms operating in one `direction of stroke being in mesh with said central toothed wheel, a toothing on the driven shaft, the rims of the control mechanisms operating in the other direction of stroke being in engagement with the toothed rim of the driven shaft, and reversing gears each in mesh with a rim of two control mechanisms operating in one and the other direction of stroke.

2. A gear according to claim 1, wherein the control mechanisms comprise recessed cages arranged on the pins, clamp rolls disposed in the recesses of the cages, the recesses in the cages operating in one or the other direction of stroke being opposite, and wherein the toothed rims are E loosely rotatably arranged on the cages and the :,isaave clamprollsintheeagesdrivetherimsinone directionatatime.

3.Agearaccordingtociaim1,whereinthe reverainggearsinmehwithoneanotherare recessedatoppositeendathetoothingsoftwo sdiacent control mechanisms acting in opposite ranged in a circle around .said eccentric member,

rocking levers actuated by said eccentric member,

a pin about which said rocking levers oscillate, two of said control mechanisms operating in opposite directions being arranged on said pin one behind the other, toothed rims on said control mechanisms, a central toothed wheel loosely rotatably disposed on said driven shaft, the rims of the control mechanisms operating in one direc= tion being in mesh with said central toothed wheel, a toothed rim for the driven shaft, the rims of the control mechanisms operating in the other direction being in engagement with the toothed rim of the driven shaft, reversing gears each in mesh with a rim of two control mechanisms operating in one and the other direction of stroke, said control mechanisms comprising recessed cages arranged on pins, clamp rolls disposed in the recesses of the cages, the recesses in cages operating in one or the other direction being opposite, toothed rims loosely rotatably arranged on the cages, said clamp rolls in the cages driving the rims in one direction at a time, said reversing gears in mesh with one another being recessed at opposite ends and the toothings of two adjacent control mechanisms acting in opposite directions freely move in said recesses, said control mechanisms being recessed also to permit free motion of the toothings of the reversing gears in said recesses, the second control mechanisms operating in opposite direction and positioned above or below the two adjacent control mechanisms being in engagement with the reversing gears.

RICHARD SEIDEL. 

